In a recent issue of Woodsmith magazine (Vol 39 / No 230) there is an article discussing using 8 mm dominos but cutting the mortise with a 5/16 router bit or end mill. If my math is correct the 8 mm domino is thicker than 5/16 not by much but it is still thicker.
5/16 = .3125
8 mm= .31496
Difference is the domino is .00246 thicker than 5/16.
This being said will the domino fit into the mortise and allow for glue? If the domino was that much thinner than 5/16 then I think it would work. Is the accuracy of the mortise cut with the router bit off that much or more?
Thoughts and opinions?
Thanks